Title :
Preparation of SrAl2O4: Eu, Dy Phosphor by Nano-Coating Process and Its Optical Properties
Author :
Yang, Xuefeng ; Ning, Guiling ; Pan, Wen ; Lin, Yuan
Author_Institution :
Sch. of Chem. Eng., Dalian Univ. of Technol., Dalian
Abstract :
The SrAl2O4: Eu2+, Dy3+ phosphor nanoscale powders with high brightness were prepared by a nano-coating process. The resulted SrCO3@ Al2O3 core-shell precursors were characterized by transmission electron microscope (TEM), which indicates that the precursor particles have narrow size distribution. The structure and optical properties of the phosphor powders were investigated systematically by means of X-ray diffraction (XRD) and spectroflourometer. It was found that the single-phase SrAl2O4 formed at 1000degC, which is approximately 300degC lower than that required for the conventional solid-state reaction. What is more, the impurity phase 3SrOAl2O3 can be completely removed by the present method. Also, the luminescence intensity is higher than that prepared by solid-state process in the comparable condition.
Keywords :
dysprosium; europium; luminescence; nanoparticles; optical films; phosphors; strontium compounds; transmission electron microscopy; SrAl2O4:Eu,Dy; X-ray diffraction; nano-coating process; optical properties; phosphor; temperature 1000 degC; transmission electron microscope; Brightness; Electron optics; Impurities; Optical diffraction; Phosphors; Powders; Solid state circuits; Transmission electron microscopy; X-ray diffraction; X-ray scattering; Dy; Eu; SrAl2O4; core-shellprecursors; nano-coating; phosphors;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2006. NEMS '06. 1st IEEE International Conference on
Conference_Location :
Zhuhai
Print_ISBN :
1-4244-0139-9
Electronic_ISBN :
1-4244-0140-2
DOI :
10.1109/NEMS.2006.334560
